#!/usr/bin/env bash
# =============================================================================
# Local Radio Station — Initial Setup Script
# Run as root on Debian 13
# =============================================================================
set -euo pipefail

INSTALL_DIR="/opt/localradio"
RADIO_USER="localradio"
RADIO_GROUP="localradio"

echo "=== Local Radio Station Setup ==="

# --- Install system packages --------------------------------------------------
echo "[1/7] Installing system packages..."
apt-get update
apt-get install -y \
    icecast2 \
    liquidsoap \
    python3 \
    python3-venv \
    python3-pip \
    ffmpeg \
    sqlite3

# --- Create system user ------------------------------------------------------
echo "[2/7] Creating system user..."
if ! id "$RADIO_USER" &>/dev/null; then
    useradd --system --home-dir "$INSTALL_DIR" --shell /usr/sbin/nologin "$RADIO_USER"
    echo "  Created user: $RADIO_USER"
else
    echo "  User $RADIO_USER already exists"
fi

# --- Create directory structure -----------------------------------------------
echo "[3/7] Creating directory structure..."
mkdir -p "$INSTALL_DIR"/{config,scripts,state/queue,media/music/{morning,day,night,weekend},media/podcasts,media/fallback,logs}

# --- Copy project files -------------------------------------------------------
echo "[4/7] Copying project files..."
SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"

cp "$SCRIPT_DIR/config/station.liq"   "$INSTALL_DIR/config/"
cp "$SCRIPT_DIR/config/icecast.xml"   "$INSTALL_DIR/config/"
cp "$SCRIPT_DIR/config/station.yaml"  "$INSTALL_DIR/config/"
cp "$SCRIPT_DIR/config/localradio.env" "$INSTALL_DIR/config/"

# Only copy feeds.yaml if it doesn't already exist (preserve user edits)
if [ ! -f "$INSTALL_DIR/config/feeds.yaml" ]; then
    cp "$SCRIPT_DIR/config/feeds.yaml" "$INSTALL_DIR/config/"
fi

cp "$SCRIPT_DIR/scripts/"*.py "$INSTALL_DIR/scripts/"
cp "$SCRIPT_DIR/scripts/"*.sh "$INSTALL_DIR/scripts/" 2>/dev/null || true
cp "$SCRIPT_DIR/requirements.txt" "$INSTALL_DIR/"

# Copy web UI
cp -r "$SCRIPT_DIR/web" "$INSTALL_DIR/"

# --- Set up Python virtual environment ----------------------------------------
echo "[5/7] Setting up Python virtual environment..."
python3 -m venv "$INSTALL_DIR/venv"
"$INSTALL_DIR/venv/bin/pip" install --upgrade pip
"$INSTALL_DIR/venv/bin/pip" install -r "$INSTALL_DIR/requirements.txt"

# --- Build frontend -----------------------------------------------------------
echo "[5b/7] Building frontend..."
if command -v npm &>/dev/null; then
    cd "$INSTALL_DIR/web/frontend"
    npm install
    npm run build
    cd -
    echo "  Frontend built successfully"
else
    echo "  WARNING: npm not found. Install Node.js and run:"
    echo "    cd $INSTALL_DIR/web/frontend && npm install && npm run build"
fi

# --- Initialize database ------------------------------------------------------
echo "[6/7] Initializing database..."
PYTHONPATH="$INSTALL_DIR/scripts" "$INSTALL_DIR/venv/bin/python" \
    "$INSTALL_DIR/scripts/init_db.py" "$INSTALL_DIR/state/radio.db"

# --- Set ownership ------------------------------------------------------------
echo "[7/7] Setting file ownership..."
chown -R "$RADIO_USER:$RADIO_GROUP" "$INSTALL_DIR"

# Make scripts executable
chmod +x "$INSTALL_DIR/scripts/"*.sh 2>/dev/null || true
chmod +x "$INSTALL_DIR/scripts/"*.py

# --- Install systemd services -------------------------------------------------
echo ""
echo "=== Installing systemd services ==="
cp "$SCRIPT_DIR/systemd/"*.service /etc/systemd/system/
systemctl daemon-reload
systemctl enable localradio-icecast localradio-stream localradio-poller localradio-web

echo ""
echo "=== Setup Complete ==="
echo ""
echo "Next steps:"
echo "  1. Add music files to $INSTALL_DIR/media/music/{morning,day,night,weekend}/"
echo "  2. Add at least one audio file to $INSTALL_DIR/media/fallback/"
echo "  3. Edit $INSTALL_DIR/config/feeds.yaml to add your podcast RSS feeds"
echo "  4. Review $INSTALL_DIR/config/icecast.xml passwords"
echo "  5. Start services:"
echo "       systemctl start localradio-icecast"
echo "       systemctl start localradio-stream"
echo "       systemctl start localradio-poller"
echo "       systemctl start localradio-web"
echo "  6. Listen at: http://localhost:8000/stream"
echo "  7. Web dashboard: http://localhost:5000"
echo ""